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As somebody told me today, don't put your laptop in your car for any length of time. The heat will kill the processor. As he said, that's why computers have the fans in the back.
The little smarty told me you can get a macbook off ebay at dirt cheap prices (because the newer versions come out and the older ones are sold at low prices).
I did go on to Amazon today to look at laptops and some of those prices were pretty good.